Steam on Linux went from 1.4% at the start of 2025 and hit 3.58% at the end of that year. That's a 156% increase in device adoption in a single year. Most platforms would be happy with such growth.
The more important point is this: look at the growth trajectory. Windows11 and - I'm being told they've changed their name to Microslop, can anyone confirm? - are on the nose. Linux growth at the current rates would see a ~10% adoption rate in 2026. That then establishes a serious threat to the current gaming platform hegemony.